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Fig. 2 | Geothermal Energy

Fig. 2

From: Estimating in situ rock mass strength and elastic modulus of granite from the Soultz-sous-Forêts geothermal reservoir (France)

Fig. 2

Photographs of representative samples taken from EPS-1 (Soultz-sous-Forêts) geothermal borehole. All samples were re-cored to a diameter of 40 mm. All samples are from the uppermost (facies 1; see text for details) standard porphyritic granite. a An example of a sample of standard porphyritic granite from the palaeo-weathered zone. b An example of a sample of standard porphyritic granite (from below the palaeo-weathered zone)

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